Improvement in tobacco-pipes



JONATHAN DAVIS, OF ST. PAUL, MINNESOTA.

IMPROVEMENT m TOBACCO-PIPES.

Specification forming part of Letters Patent No. 189,023, dated April 3,1877; application filed August 2, 1876.

To all whom it may concern:

Be it known that I, JONATHAN DAVIS. of St. Paul, in the county of Ramseyand State of Minnesota, have invented certain new and usefulImprovements in Pipes and Stems, of which the following is aspecification:

This invention relates to certain improvements in tobacco-pipes andstems therefor, its object being to cool the smoke and condense thevolatile products of combustion of the tobacco, which contain thenicotine and other deleterious substances, and prevent the same and anyashes or light particles of tobacco from being drawn into the mouth ofthe smoker.

My invention consists, first, in a pipe, the body of which is. providedwith a series of channels, through which the smoke has to pass on itsway to the pipe-stem; and, second, in a pipe-stem provided with similarchannels for the smoke, by means of which the smoke is compelled to passover an extended surface on its way to the mouth of the smoker, wherebythe smoke is cooled and all deleterious substances condensed andcollected.

In the drawing, Figure 1 represents a view of my improved pipe and stemwith a portion of the outer shell removed. Fig. 2 represents a sectionalview of the pipe and stem. Fig.

.3 represents horizontal sectional views of the body, taken on" lines a;w and 3 y of Fig. 2; and Fig. 4 shows a modification of the pipestem, inwhich the channels are formed on the interior of the outer shell,instead of on' the exterior of the inner shell of the same.

The drawing represents the pipe-body, consisting of an inner shell,A,made in the shape of a frustum of a cone, and, preferably, of'

cherry wood, and an outer shell, B, adapted to fit closely over theinner shell, and, preferably, constructed of birds-eye maple. The innershell is divided into two chambers or compartments by means of aremovable plug, a, and on its exterior are formed two parallel spiralgrooves, 11 a, starting from the ducts or perforations b b, on oppositesides of the pipebody, near its top, and communicating with the uppercompartment or chamber, and terminating at similar ducts, c c, onopposite sides, near the bottom of the pipe-body, which communicate withthe lower compartment or chamber of the pipe-body. The letter Drepresents a removable fire-pot, constructed of any refractory material,the exterior of which is somewhat smaller than the interior of the innershell of the pipe-body, in which it is adapted to sit, so as to leave anannular space between the two, for the purpose to be hereinafterexplained. The said fire-pot is provided on opposite sides, near thebottom, with ducts or openings d d, leading into the annular spacebetween the fire-pot and the inner shell. The letter E represents aremovable bottom, adapted to fit upon a flange, e, on the lower part ofthe inner shell of the pipe-body, inclosing the lower chamber thereof.Said. bottom is provided with a central aperture, F, to which the stemis attached. The stem of the pipe is composed of the body G, shortsupplementary stem H,.an outer shell, I, and is provided with amouth-piece, K, of the ordinary construction. The body G consists of atapering tube, of suitable length, divided near the top into twocompartments by means of a partition, g. On the outer surface of saidbody are formed aseries of parallel spiral grooves, h, extending from aseries of ducts, t, leadingfrom the upper compartment to a series ofsimilar ducts, k it, below, leading into the lower compartment near itsbottom. The supplementary stem H consists of a tapering tube, about halfthe length of the body G, and somewhat smaller in diameter than theinterior of the lower chamber of said body. The said tube is enlarged atits lower end, and provided with a cork packing, M, setting against theshoulder formed by such enlarged portion, which packing fits neatly'intothe lower end of the body G, and serves to connect the two parts of thestem. The lower end of the enlarged portion of the tube is madetapering, in order to fit into the curved neck N of the bowl of the pipefor the purpose of connecting the pipe and stem together.

' The operation of my improved pipe is as follows: The parts beingproperly secured together, during the act of smoking the smoke andcondensable products of com bustion make their escape from the fire-potthrough the ducts at the bottom intothe annular channel between said potand the inner shell of the pipebody; thence out through the ducts at thetop of the same into the spiral channels around said body, and then intothe lower chamber of the body through the ducts leading thereto. Fromthis chamber the smoke passes into the stem through the supplementarystem leading into the main body of the same; and from thence into thespiral channels around the same; and, finally, into the upper chamber ofI body G, divided into two compartments by the partition g, saidcompartments communicating said body, after which the smoke passes tothe month of the smoker. I

It-will be seen that the smoke is thus made to travel over a veryextended surface on its way to the mouth of the smoker, whereby it iscooled, and all deleterious substances-such as condensable vapors,ashes, and light particles of tobacco-are deposited and. collected,leaving the smoke absolutely cool and pure when it finally escapes.

What I claim, and desire to secure by Letters Patent, is- 1. In apipe-bowl, the combination of the inner shell A, divided into twocompartments by the partition G, and provided with spiral grooves 00 onthe outside communicating with ducts leading to said compartments, withthe outer shell B fitting over said inner shell, and

the fire-pot D sitting within said inner shell,

the whole arranged to operate substantially as set forth.

2. In a pipe-stem, the combination of the with each other by means ofspiral channels on the outside of said body, and the outer casing, andsupplemental stem H, secured in the lower part of the body,substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

JONATHAN DAVIS.

Witnesses:

J. M. GILMAN, (J. T. WARD.

